How to Make a Magazine style Horizontal Sub Nav menu for Thesis theme

Thesis theme is one of the most favored premium themes in terms of customization and SEO. Recently I have made a custom skin for this blog. Efforts are still ON to make it more unique and simple. After the new skin change many friends have asked me about the Navigational menu with Horizontal Sub Navigation. In this menu the sub categories are displayed horizontally, rather than the conventional vertical drop down sub nav Menus.

Copy the following code in your “functions.php” file (Don’t forget to take a backup)

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I tried to follow this tutorial but some reasons, the code for the custom.funtion.php gives me error syntax and cannot modified header notification. I cleaned up the code by pasting it in a note pad and removing the left indent before I inserted in the custom funtion but to no avail. What do you thin is the reason?